French Defense Winawer Variation Discovered Attack in Chess

In the French Defense Winawer Variation, a “discovered attack” happens when one piece moves away (often after a tactical exchange or sacrifice) to open a line for another piece to attack a target. A defining feature is the Winawer’s queenside tension around the c5–d6 squares, where piece lines (especially along diagonals or files) can suddenly become active after a forcing move. The discovered attack is the moment the “unblocked” piece reveals a threat that was hidden one move earlier.